/// @description 残影例子
// You can write your code in this editor

//残影数量
shadow_num = 10;

//初始化残影
for(var i = 0; i<shadow_num; i++)
{
	shadow_arr[i, 0] = x;
	shadow_arr[i, 1] = y;
}

//定时添加
shadow_tim = 1;
alarm[0] = shadow_tim;